I wouldn't go so far as making the category specific to installation of the IDE, but certainly the category name is ambiguous.
However, surely this category could only be considered "new" on a geologic time scale?
I agree 100%
It does seem cryptic.
Thinking about it now, I have never used that feature and I'm wondering if it is because I instinctively ignore this mysterious button.
It is somewhat inconsistent with the other action buttons in that it is not a verb. Probably an improvement over "defer" even so. I don't have a better suggestion.
Do you mean HTML tags (e.g., <b>)?